So you set your tubs on top of the probe? I didn't know if the temperature would be messed up since it would be like a warm cacoo. Currently mines set at 92 and and i get a hot spot of about 94-95, so i guess if i kept it under i would have readings of about 105 when its really only about 95 or so.

Also do you have a problem with the part not on the tub being a whole lot colder than the heated part? Granted the room my snakes are in is 71 degrees and the tubs are a good twenty degrees warmer. But my cold spots are like 76 if i don't have 80-90% of the tub on the heating element.